Patents Assigned to Saft
  • Publication number: 20230125633
    Abstract: The present application relates to an electrode comprising pillars of conductors covered with at least two layers for improving the deposition of lithium, and the electrochemical cells and batteries comprising same.
    Type: Application
    Filed: March 30, 2021
    Publication date: April 27, 2023
    Applicant: SAFT
    Inventors: Vincent PELE, Christian JORDY
  • Publication number: 20230120151
    Abstract: The present invention relates to a current collector for a negative electrode, coated with at least one electronically conducting and ionically insulating layer, to the method for producing such a collector, and to batteries containing same.
    Type: Application
    Filed: March 24, 2021
    Publication date: April 20, 2023
    Applicant: SAFT
    Inventors: Vincent PELE, Christian JORDY, Nadège ROUMEGOUS
  • Patent number: 11631866
    Abstract: Provided is pouch battery including an electrode assembly, and a case in which the electrode assembly is sealed and housed; the electrode assembly including a stacked structure of a sheet cathode, a sheet separator, and a sheet anode; the sheet cathode including a positive electrode active material disposed on a current collector; the sheet anode is thin conductive sheet on which lithium metal reversibly deposits on a surface thereof during discharging; the sheet anode being made of a conductive material other than lithium and having a surface substantially free from lithium metal prior to charging the battery. The pouch battery design is flexible and lightweight and provides high power density, making it a suitable replacement for conventional lithium-ion primary batteries and thermal batteries in many applications. Power can be further increased by the application of external compression. Additives and formation conditions can be tailored for forming a solid-electrolyte interface (SEI).
    Type: Grant
    Filed: June 8, 2020
    Date of Patent: April 18, 2023
    Assignee: SAFT AMERICA
    Inventors: Thomas Greszler, Saori Tokuoka
  • Publication number: 20230116369
    Abstract: The present application relates to novel mixed compounds based on oxides and sulfides, and the use thereof as a solid electrolyte, with improved sulfide stability. The application further relates to electrochemical elements and lithium batteries containing such electrolytes.
    Type: Application
    Filed: March 23, 2021
    Publication date: April 13, 2023
    Applicants: SAFT, Centre national de la recherche scientifique, ECOLE NATIONALE SUPERIEURE D INGENIEURS DE CAEN, UNIVERSITE DE CAEN NORMANDIE
    Inventors: Vincent PELE, Nadège ROUMEGOUS, Christian JORDY, Valérie PRALONG
  • Patent number: 11621455
    Abstract: A vent assembly for a battery or a electrochemical cell may include a vent body configured to connect to a battery casing or a electrochemical cell body, a flame arrester and/or a pressure valve disposed in the vent body, a membrane disposed in the vent body between a vent opening of the battery or the electrochemical cell and the flame arrester and/or the pressure valve, and that is configured to shield the flame arrester and/or the pressure valve from electrolyte solution of the battery or the electrochemical cell, and a seal disposed between the vent body and the membrane. Also, a battery including a vent assembly.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: April 4, 2023
    Assignee: SAFT AMERICA
    Inventor: Alain Emery
  • Publication number: 20230032837
    Abstract: The invention relates to a method for determining the value of one or more parameters relating to the state of health of at least one accumulator of a battery that is intended to provide electrical energy to an external application. A first state-of-health parameter related to the resistance of at least one electrochemical element of the battery is determined according to the method comprising:—a step (1) of determining the value of the state of charge of the electrochemica 1 element, expressed as a percentage of a maximum state of charge; —a step (2) of verifying whether the determined value of the state of charge belongs to a sought range; —a step of repeating, as long as the result of the verification step (2) is not positive, the determination step (1) and then the verification step (2); —calculating the value of the first parameter as a function of at least the value of the state of charge determined during the last determination step (1).
    Type: Application
    Filed: December 17, 2020
    Publication date: February 2, 2023
    Applicant: SAFT
    Inventors: Sebastien LAURENT, Nathalie LEGRAND, Sebastien BENJAMN, Cedric GOUSSET
  • Patent number: 11563212
    Abstract: A sacrificial positive active material for a lithium-ion electrochemical element which is a compound of formula (Li2O)x (MnO2)y(MnO)z(MOa)t in which: x+y+z+t=1; 1?x?y?0; 0.97?x?0.6; y?0.45; x ?0.17; y?0; y+z>0; t?0; 1?a<3. M is selected from the group consisting of Fe, Co, Ni, B, Al, Ti, Si, V, Mo, Zr and a mixture thereof.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: January 24, 2023
    Assignees: SAFT, ENSICAEN, UNICAEN, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Christian Jordy, Melanie Freire, Valerie Pralong
  • Publication number: 20230016438
    Abstract: The present invention relates to a battery comprising: -i) at least two electrochemical elements (d) connected to one another by a connection part (c), each electrochemical element comprising a container, -ii) a material arranged between said at least two electrochemical elements, and -iii) at least one disconnection device, said device comprising: a heat-activatable element (a) able to deform when its temperature reaches a threshold value, the heat-activatable element being arranged such that, when its temperature QI reaches said threshold value, it disconnects the connection part (c) from at least one electrochemical element (d) through its deformation, said heat-activatable element not contributing to the conduction of electric current when an electric current flows through said electro-chemical elements, said heat-activatable element being placed in contact with the connection part (c) and with a current output terminal.
    Type: Application
    Filed: November 30, 2020
    Publication date: January 19, 2023
    Applicant: SAFT
    Inventors: Emmanuelle GARITTE, Phillippe BOREL, Dinh An NGUYEN, Mélanie DENDARY, Laure LE GUENNE
  • Publication number: 20230010586
    Abstract: The invention deals with a sensor for sensing electrolyte creepage in a battery, a circuit comprising such sensor, and a battery connected to such circuit, with an application to an electrical circuit comprising the sensor and connecting a monitoring equipment to a to battery. The sensor element is adapted for being connected within an electrical circuit 1 connected to a battery 2, said battery comprising one or more electrochemical cells containing an electrolyte, wherein the sensor element comprises a electrical conductor element whose at least one electrical property varies when in contact with the electrolyte, such as to allow, when the sensor element is connected in a circuit, detection of an electrolyte creepage from a an electrochemical element of a battery 2 connected to the circuit 1 by measurement of the variation of the one electrical property of the conductor element.
    Type: Application
    Filed: December 6, 2019
    Publication date: January 12, 2023
    Applicant: SAFT GROUPE SA
    Inventors: Marcus KARLSTAD, Rune SJÖVALL, Robert ALEXANDERSSON, Roger FRANSSON, Alexander MOBERG, Miroslav ANDEL
  • Publication number: 20230006257
    Abstract: Disclosed is an electrolyte composition comprising: a) a solvent comprising: i) either a mixture of 1,1,1,3,3,3-hexaflu-oro-2-methoxypropane (HFMP) or of 1,1,1,3,3,3-hexafluoro-2-(fluoromethoxy)propane (HFMFP), of monofluoroethylene carbonate (F1EC) and of 2,2,2-trifluoroethyl methyl carbonate (F3EMC), ii) or a mixture of 1,1,1,3,3,3-hexafluoro-2-methoxypropane (HFMP) or of 1,1,1,3,3,3-hexafluoro-2-(fluoromethoxy)propane (HFMFP), of monofluoroethylene carbonate (F1EC) and of 2,2,2-trifluoroethyl acetate (F3EA), b) at least one lithium salt, the cation of which is the cation of an alkali metal.
    Type: Application
    Filed: August 21, 2020
    Publication date: January 5, 2023
    Applicant: SAFT
    Inventors: Julien DEMEAUX, Marlène OSWALD
  • Publication number: 20220407151
    Abstract: This invention concerns an electrochemical element, in particular a sulphurous solid electrolyte element, comprising a protective casing, as well as modules and batteries comprising such elements.
    Type: Application
    Filed: November 27, 2020
    Publication date: December 22, 2022
    Applicant: SAFT
    Inventors: Vincent PELE, Christian JORDY, Nadège ROUMEGOUS
  • Publication number: 20220407106
    Abstract: A gel-type electrolyte comprising a matrix which is a poly(vinylidene fluoride-co-hexafluoropropylene) polymer in which is embedded a liquid mixture comprising at least one lithium salt and a solvent comprising at least one linear carbonate, the poly(vinylidene fluoride-co-hexafluoropropylene) polymer matrix representing 5 to 95% by weight in relation to the weight of the gel-type electrolyte and the liquid mixture representing 95 to 5% by weight in relation to the weight of the gel-type electrolyte. This electrolyte exhibits increased stability with respect to oxidation and reduction.
    Type: Application
    Filed: October 15, 2020
    Publication date: December 22, 2022
    Applicant: SAFT
    Inventors: Julien DEMEAUX, Marlène OSWALD, Apoline GILOT
  • Publication number: 20220367842
    Abstract: Pre-lithiation methods using lithium vanadium fluorophosphate (e.g., LiVPO4F and its derivatives) (“LVPF”) as a cathode active material in a lithium-ion secondary battery. The pre-lithiation methods include compensating for an expected loss of active lithium by selecting LVPF having a specific pre-lithiated chemistry (or a blend of LVPF selected to have a specific pre-lithiated chemistry) and selecting a total amount of the pre-lithiated LVPF. The pre-lithiation methods may include initially charging the lithium-ion secondary battery at the lower of the two charge/discharge plateaus of LVPF to release active lithium.
    Type: Application
    Filed: May 13, 2021
    Publication date: November 17, 2022
    Applicant: SAFT AMERICA
    Inventors: Xilin CHEN, Frank CAO, Tyler RUFF, Jian DONG, Carine MARGEZ STEINWAY, Thomas GRESZLER, Kamen NECHEV
  • Publication number: 20220336882
    Abstract: A method for avoiding the spread of a thermal event in an enclosure containing several modules (1, 2, 3, 4) of electrochemical elements, said method comprising the following steps: —detecting one or more critical modules (1, 2, 3) situated in the enclosure, and affected by a thermal event (13), a module being critical when one or more parameters associated with the status of the module have reached or crossed a predetermined threshold, —spraying a coolant (12) onto, or into, the critical module or modules (1, 2, 3) for a determined duration and/or at a determined flow rate, one or more modules (4) not detected as being critical modules not receiving any coolant (12).
    Type: Application
    Filed: October 3, 2019
    Publication date: October 20, 2022
    Applicant: SAFT
    Inventors: Gilles HELSCHGER, Christophe LE GUERN, Jean-Louis LISKA, Christophe MORIN
  • Publication number: 20220320566
    Abstract: The invention concerns an electrochemical element and the method for manufacturing same, as well as a battery comprising one or more electrochemical elements, for application in particular in the field of electrochemical elements or Li-ion batteries. The electrochemical element comprises a closed shell (1) defining an internal volume inside which a bundle (2) is arranged, having alternating positive and negative electrodes (3) respectively connected to two positive and negative electrical output terminals and housing separators, the bundle (2) being impregnated with electrolyte. The shell (1) comprises a bottom wall (4) having an internal bottom face (4a), oriented towards the internal volume, and at least one side wall (5, 6) having an internal side face (5a, 6a), oriented towards the internal volume. The internal side face (5a, 6a) joins the internal bottom face (4a) by substantially forming an internal angle (a).
    Type: Application
    Filed: July 10, 2020
    Publication date: October 6, 2022
    Applicant: SAFT
    Inventor: Gerard RIGOBERT
  • Publication number: 20220293934
    Abstract: A composite electrode with a solid electrolyte based on polycarbonates includes at least one solid electrolyte consisting of one or more (co)polymers obtained by ring-opening (co)polymerization (ROP) of at least one five- to eight-membered cyclic carbonate and, optionally, of at least one five- to eight-membered lactone, catalyzed with methanesulfonic acid or performed under microwave irradiation in the absence of catalyst. The hydroxyl functions at the end of the chain of the (co)polymer(s) may be protected. The electrode also includes at least one alkali metal or alkaline-earth metal salt and at least one electrode active material. The electrode may include one or more electrically conductive additives and/or one or more binders. The electrode may be used in an electrochemical system such as a lithium battery.
    Type: Application
    Filed: March 9, 2022
    Publication date: September 15, 2022
    Applicants: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, SAFT
    Inventors: Huu-Dat NGUYEN, Lionel PICARD
  • Publication number: 20220285734
    Abstract: An electrolyte composition comprising: a) a solvent comprising: a mixture of at least two saturated cyclic carbonates, at least one of these saturated cyclic carbonates being fluorinated, at least one ether, said at least one saturated cyclic carbonate representing at most 1.5% by weight of the solvent, said at least one ether representing at least 40% by weight of the solvent; b) at least one lithium salt other than lithium difluorophosphate; c) lithium difluorophosphate in an amount representing from 0.1 to 1% by weight relative to the sum of weight of the solvent and weight of said at least one lithium salt. The use of this composition in an electrochemical cell comprising a lithium anode allows increased performance of the cell when it is discharged under a strong current at low temperature, and limited self-discharging when in operation at ambient temperature.
    Type: Application
    Filed: July 9, 2020
    Publication date: September 8, 2022
    Applicant: SAFT
    Inventors: Olivier HUCHET, Julien DEMEAUX, Michael CARRIQUIRY
  • Publication number: 20220278309
    Abstract: An electrochemical cell of the lithium/sulfur type comprising: a) a cathode comprising: i) microporous carbon in the form of particles, the particle size distribution being characterized by a median volume diameter Dv50 of the particles which is greater than or equal to 1 ?m and less than or equal to 5 ?m; ii) sulfur having an oxidation degree in the range of 0 to ?2 in the pores of the microporous carbon; b) an electrolyte comprising a solvent, said solvent comprising at least one fluorinated carbonate; c) an anode composed of lithium metal or of a lithium metal alloy. The electrochemical cell exhibits an improved specific gravimetry and an improved life cycle.
    Type: Application
    Filed: August 22, 2019
    Publication date: September 1, 2022
    Applicants: SAFT, KEMIJSKI INSTITUT
    Inventors: Florent FISCHER, Thierry HEZEQUE, Laura Maria PARA, Cecilia Andrea CALDERON, Robert DOMINKO
  • Patent number: 11360535
    Abstract: The present invention is notably directed to methods and systems for protecting a pre-charge circuit. The present invention is further directed to related computer-implemented program product. The method comprises monitoring the current flowing through the current limiting device, calculating the energy loading of the current limiting device over time, and managing the system state to prevent damaging operation of the pre-charge circuit.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: June 14, 2022
    Assignee: Saft America, Inc.
    Inventors: Ali Zenati, Christopher Thorpe, Theodore Brown
  • Patent number: 11360144
    Abstract: The present invention is notably directed to methods for estimating a degradation of an electronically controlled electro-mechanical switch. The methods comprise determining a change of state of the contactor. They also comprise, computing, for each determined change of state, a wear increment WI of the contactor by: identifying a wear coefficient using a mapping between a last measured current through the contactor and a current range associated with a given wear coefficient; computing the actual wear WN of the contactor by adding the computed wear increment WI to a former known wear WI?1 of the contactor.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: June 14, 2022
    Assignee: Saft America, Inc.
    Inventors: Ali Zenati, Christopher Thorpe, Theodore Brown